A great deal in the knowledge of medieval mining procedures comes from publications for instance Biringuccio's De la pirotechnia and possibly most of all from Georg Agricola's De re metallica (1556). These textbooks detail a variety of mining solutions Employed in German and Saxon mines. By clicking “Take All Cookies”, https://preciousmetalinvestments64062.total-blog.com/rumored-buzz-on-safe-haven-assets-63007694